This is a really good point. That is why we partially open-sourced our technology to enable unbiased third party evaluation. You can run the exact same demo on a Linux box or Raspberry Pi (any variant) using what's available on the project GitHub repository here: https://github.com/Picovoice/rhino

We are in process of open-sourcing a statistically-significant benchmark for this tech. But this will happen in 2019.